JPH039575Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to an electric valve for a fire hydrant that is suitable for one-person operation.

B. Prior Art Conventionally, fire hydrants used in buildings, tunnels, etc. are generally stored in a box with alternately folded hoses hung on a comb-shaped hose hanger. In the event of a fire, one operator heads to the scene with a nozzle attached to the end of the hose, stretches the hose, and then another operator opens the water valve. Therefore, when there is only one operator, he must stretch the hose, return to the box, open the water discharge valve, and return to the nozzle position.

c Problems that the invention aims to solve The water pressure of such fire hydrants is quite high, so when the water discharge valve is opened and the hose returns to the nozzle, the water pressure causes the hose to dance, making it difficult to extinguish the fire. It will take a lot of time. Therefore, it was difficult to extinguish a fire when there was only one operator.

The object of the present invention is to solve the above-mentioned problems and provide an electric valve for a fire hydrant that allows a single operator to easily extinguish a fire.

d. Means for Solving the Problems In order to solve the above problems, the present invention includes a valve body that opens and closes by rotating the handle, and a drive motor that opens and closes the handle shaft of the valve body via a transmission means. , a circuit for driving this drive motor, one end of which is connected to the water outlet of the valve body, a water spray nozzle is connected to the other end of the hose, and a preset time is set after activation of the start switch of the drive motor. A circuit is also provided to operate the drive motor for a certain period of time and open the fire hydrant valve after the elapse of time.

e action The functions of the present invention are as follows.

After pressing the start switch on the drive motor that opens the water spray valve, head to the fire scene with the water spray nozzle in hand and stretch out the hose. The drive motor operates for a certain period of time after a preset time has elapsed from activation of the start switch, and opens the water discharge valve. As a result, by the time you reach the fire scene with the nozzle in hand, the water discharge valve opens and immediately
Can participate in firefighting.

f Examples The present invention will be described in detail below with reference to the drawings.

In Figures 1 to 3, 1 is a box;
2 is a door, and 3 is a reel support plate that rotates horizontally around one end. The reel support plate 3 is connected to a connecting rod 4 whose lower end is pivotally connected to the wall of the box 1.
, a support shaft 5 supported by the tip of the rod, and a plate member 6 whose base is rotatably supported by the shaft 5.
Consisting of 7 is a water nozzle, and 8 is a hose. The hose 8 is folded into multiple folds, for example, in two or in four, so that the connection joint is exposed on the outermost side, and then rolled up on a reel 9. 10 is a fire hydrant valve, and the base end of the hose 8 is connected to the water discharge port 10a of the fire hydrant valve 10. By pulling the water discharge nozzle 7 attached to the tip of the hose 8, the hose is discharged from the reel 9. 8 is drawn. This fire hydrant valve 10 is also provided with an opening/closing device 11 as shown in FIG. This opening/closing device 11 includes a drive motor 12 equipped with a speed reducer, and an electromagnetic clutch 1 connected to an output shaft 12a of the drive motor 12.
3, a gear 14 attached to the output shaft 13a of the electromagnetic clutch 13, and a handle 15 for opening and closing the fire hydrant valve 10 that meshes with the gear 14.
The gear 16 is attached to the handle shaft 15a of the handle shaft 15a. This gear 16 is connected to the handle shaft 15
The thickness l of the gear 16 is set so that it meshes with the gear 14 over the range of movement of the gear 16. for example,
The gear 16 used has a bowl-shaped vertical section with a hollow interior. Further, the gears 14 and 16 can be set to an appropriate tooth ratio to reduce the speed to a constant speed.

On the other hand, the drive circuit for the drive motor 12 uses, for example, a circuit as shown in FIG.

To explain this drive circuit, P and N are DC24V
The DC power supply terminal, SW, is this DC power supply terminal P,
N is a switch that opens and closes the drive circuit, F is a fuse, and PL is a pilot lamp. 17 is a drive circuit that operates the drive motor 12 to open the fire hydrant valve 10; 18 is a drive circuit that operates the drive motor 12 to open the fire hydrant valve 10;
This is a drive circuit that operates the drive motor 12 to close 0.

The drive circuit 17 has a relay _R1 connected to power terminals P and N.
and its normally open contact r _1-1 are connected in series, and this series circuit consists of a timer relay TR ₁ that can be set for about 0 to 30 seconds and a normally open contact r _1-2 of relay R ₁ . are connected in parallel. PB ₁ is a water discharge push button switch connected to both ends of relay contact r _1-1 . Timer relay TR ₁ and relay contact r ₂
In the series circuit of the normally open contacts of the timer relay TR ₁
A series circuit of TR ₁ and a timer relay TR ₂ that can be set from 0 to 10 seconds are connected in parallel.
Connect both ends of timer relay TR ₂ to the timer relay
It is connected to the drive motor 12 via normally closed contacts tr _2-1 and tr _2-2 of TR ₂ . r _3-1 and r _3-2 are relay contacts
This is a normally closed contact of a relay R ₃ on the water cutoff side, which will be described later, and which is inserted between tr _2-1 and tr _2-2 and the drive motor 12.

On the other hand, the drive circuit 18 is different from the drive circuit 17 in that the polarity with respect to the power supply terminals P and N is reversed, and the normally closed contact tr ₃ of the timer relay TR ₃ , the relay R ₂ and its normally open contact r _2-1 are connected to each other. Connect in series to power terminal NP
It is connected to. A series circuit consisting of a timer relay TR ₃ that can be set for about 0 to 10 seconds and a normally open contact r _2-2 of relay R ₂ is connected in parallel to this series circuit, and relay R ₂ is connected to relay R _3. They are connected in parallel. PB ₂ is a water cutoff push button switch connected to both ends of normally open contact r _2-1 of relay R ₂ .

Both ends of the relay R ₂ and contact r _2-1 are connected to the drive motor 12 via normally open contacts r _2-1 and r _2-2 of the relay R ₂ , respectively. These normally open contacts
Normally open contacts r _3-3 and r _3-4 of relay R ₃ are inserted between r _2-1 and r _2-2 and the drive motor 12, respectively. This makes relay contact r _3-3 a relay contact.
_{The relay contact r 3-4 will} be commonly connected to the relay contact r _3-2 .

19 is an alarm switch, 20 is a pump start switch, and 21 is an adjustment button for setting the operating time of timer relay _TR1 . This adjustment button 21 can be used to set the time until the hose is fully extended, for example, from 0 to 30 seconds.

Next, the operation of the present invention will be explained.

In the event of a fire, open the fire hydrant door 2, press the alarm switch 19, and turn on the pump start switch 2.
Press 0. Then, press the switch SW of the drive circuit to adjust the timer until the water spray starts.
Set by. Next, hold the water spray nozzle 7 and press the water spray push button switch _PB1 . When pushbutton switch PB ₁ is pressed, relay R ₁ is energized and the contacts
r _1-1 and r _1-2 are closed and timer relay TR ₁ is energized. Then, holding the water spray nozzle 7,
When arriving at the fire scene, contact tr ₁ closes after a certain period of time. This allows the timer relay to
When TR ₂ is energized, the drive motor 12 is connected to the power source E, and at the same time, the electromagnetic clutch 13 is actuated to drive the gear 14 and the gear 16 meshed with it.
to drive. By driving the gear 16, the handle shaft 15a rotates, opening the fire hydrant valve 10,
Water spraying begins. In the handle shaft 15a, when the fire hydrant valve 10 is completely opened, the contacts tr _2-1 and tr _2-2 of the timer relay TR ₂ are opened, and the operation of the drive motor 12 and the electromagnetic clutch 13 is stopped.
In this way, the rotation of the handle shaft 15a is stopped.

Next, to stop the water discharge, press the water cutoff push button switch PB ₂ , and the relay R ₂ will be energized and the r _2-1
to r _2-4 are closed, and relay R ₃ is also energized to open contacts r _3-1 and r _3-2 and close contacts r _3-3 and r _3-4 . In this way, the drive motor 12 is connected to the power source E with the positive and negative sides reversed,
It is driven in the opposite direction to the previous one. In this way, the handle shaft 15a rotates in the opposite direction and closes the fire hydrant valve 10. After a certain period of time, timer relay TR ₃ opens contact tr ₃ , deenergizes relays R ₂ and R ₃ , and closes contact tr 3.
r _2-1 ...R _2-4 and contacts r _3-3 and r _3-4 are opened.

In addition, the handle shaft 15a of the fire hydrant valve 10
can also be done manually.

In addition, the pump start switch 20 is a switch
It may be linked with SW, or it may be linked with water discharge push button switch _PB1 .

g. Effects of the invention As described above, according to the electric fire hydrant valve according to the invention, the fire hydrant valve can be opened after a certain period of time has passed after pressing the push button switch, so it can be easily opened even by a single operator. fire extinguishing activities can be carried out. Furthermore, when there is a plurality of operators, the fire hydrant valve 10 can be opened by turning the opening/closing handle 15. Furthermore, since the time until the start of water spraying can be set using the adjustment button, the time until the start of water spraying can be easily set depending on the distance to the site, etc.

[Brief explanation of drawings]

Fig. 1 is a conceptual diagram showing an embodiment of the electric valve for fire hydrants of the present invention, Fig. 2 is a circuit diagram showing a drive circuit of the electric valve of Fig. It is a conceptual diagram showing a fire hydrant to which an electric valve is applied. 10...Fire hydrant valve, 11...Opening/closing device,
12... Drive motor, 14, 16... Gear, 15
...Handle for opening and closing fire hydrant valve, 15a...Handle shaft, 17, 18...Drive circuit.

Claims (1)

[Scope of utility model registration request] A valve body that opens and closes by rotating the handle,
It is equipped with a drive motor that opens and closes the handle shaft of this valve body via a transmission means, and a circuit that drives this drive motor, and a water discharge nozzle is attached to the tip of a hose whose base end is connected to the water discharge port of the valve body. After connecting and operating the start switch of the above drive motor,
An electric valve for a fire hydrant, characterized in that it is equipped with a circuit that operates the drive motor for a certain period of time after a set time for extending a hose has elapsed.